"We've created a transform application server for integration with the MalwareDomainList.com DB. If you want to see how it works you can download the Community Edition of Maltego (if you don't have it already) from http://www.paterva.com/maltego/.
Once you have it running you should go to Tools -> Manage transforms and click on Discover Transforms.
You can now add a new discovery server with name "MALTAS" and URL http://ctas.paterva.com/MALTAS.xml"
Pretty handy when all you have is a possible bad IP and want to see if they are already on the "bad boy" list. Being able to see the URL serving up the malware is handy too so you can grab it for analysis.